Stop motion



E. F. AND 1; F. CONNELLQ S TOP MOTION. APPLICATION FILED JAN. 4, 1921.

1 ,42 3,398. Patented July 18, 1922 .r T- M 15 ,2 l 1' 1/ R WITNESSES 6 IWENTORS fEWA/EDF ONNELL M614 JwvgfW A TTORNEYS UNITED STATES,

PATENT OFFICE.

nnwaan rmuois oommm. AND Joint FRANCIS conmrl, or rnomca, massacmrsn'rrs.

sror mo'rIoN.

Specification of Letters iatent.

Patented July 18, 1922.

Application filed January 4, 1921. Serial No. 434,977.

setts, have invented a new and Improvedactuating the stopping motion whenever any Stop Motion, of which the following is a full, clear, and exact description.

Our invention relates to stop motions, and more particularly to stop motions of the kind in which one or more electric circuits normally closed, are opened as a'means of controlling thestoppage of the machines with which the stop motion is'associated.

More specifically stated, our invention relates to stop motions suitable for use upon looms, knitting machines and other devices for manufacturin fabrics and in which the stop motion is un er the control of a thread normally taut.

Our invention contemplates means for one of several distinct troubles arises in connection with the thread used for controlling the stop motions.

In this connection it may be stated that for the purposes contemplated by our invention the stop motion should be actuated Whenever it happensthat the controlling thread becomes exhausted or breaks, or.for

any reason becomes too tight, or'if it carriesa knot or a tan le such as would ordinarily be objectiona le.

Reference is made to the accompanying drawing forming a part of the specification in which like reference characters indicate like parts through the several views, .and in which- I Figure 1 is'a front elevation" of our improved stop motion. s Fig. 2 is a side'elevation of the same.

Fig. 3 is a section on the line 3-3 of Fig. 1, looking in the direction indicated" by the arrow.

Fig. 4 is a plan view of our device.

A supporting board is shown at .1 and has generally the form of a standard, which 'is provided with an arm 2 of substantiall L-shape located at its bottom and exten ing laterally from it as may be understoodmore particularly from Figs. 2 and 3. Thearm 2 carries two leaf springs '3, 4, which are provided with a contact 5, controllable by an adjusting screw 6, as indicated more particularly in F ig. 2. Staple guides 7, 8 are mounted upon the board l and spaced apart. The thread used for controlling the stop motion appears-at 9 and travels through the guides 7, 8. A friction lug is shown at 10 and is provided with a semi-cylindrical portion 11 at the upper end portion of if the spring 3.- A stationary arm 13 made preferably of stout wire is secured to the board l and extends obliquely upward therefrom as indicated in Figs. 1 and 2. The

upper end'portion of this arm 13 is formedinto a V-bearing 12 for supporting the thread 9. A contact arm 14 is secured directly upon the board 1 and above this contact arm is a bearing 15. Supported upon the bearing '15. is a swinging arm 16 provided with two ey'e sj17, 18, throu h which the thread 9 passes. A tension ar 19 is mounted upon the upperend of' the board 1 and is engaged by the thread 9. An eye 20 through which the thread 9 extends, is mounted upon a leaf spring 21, this leaf spring! being secured upon the upper end portion of a metallic post 22, this post being mounted directly upon the board 1 and extending upwardly therefrom.

A metallic tongue 23 is supported by the post 22, and is-insulatedtherefrom by a plate 24 of hard rubber or other appropriate insulating material. Extending through the metallic tongue 23 is a contact screw 25 which is so positioned as to be easily engaged by the contact spring 21 when the latter is drawn down into its abnormal position, as indicated by dotted lines in Fig. 2. A binding post 26 is mounted upon the metallic ton e 23 and is connected with a Wire 27. Tlils wire leads to another binding post 28, which is mounted directly upon the back of the board 1. A wire 29 leads from the bindingpost 28to another bindingfpost 30 and from the lattera wire 31 leads to the spring post a wire 34 leads to a battery 35, or other appropriate source of electricity. A wire 36 is connected with the binding post 30. The wires 36 and 34 together with the battery 35 are used for controlling the stoppage of the machine. This feature bein old and well known we will not describe. wire 37 leads from the binding post 33 to another binding post 38. This binding post being pro- 6 vided with a bolt 39, extends through the board 1 and engages the contact arm 14. A-

wire 40 leads from the binding post 38 to the metallic post 22. The thread 9 is located between the bobbin 10 and the carrier, as is customary in this art.

The thread being in position, asshown, and being under tension, the various electrical contacts are open as may be understood from Fig. 2. The swinging arm'16 and the contact arm 14 together constitute a contact which is normally open as indicated by full lines in Fig. 2, but which may be closed as indicated by dotted lines in said figure. The contact between the screw and the leaf 20 spring 21 is normally open, as indicated by arranged as to control the'stoppage of the machine with which the stop motion is associated.

The operation of our device is as follows:

The various parts are constructed and arranged as above described, the thread 9 being under tension and being drawn through the device, the various contacts are all open. I

Suppose now that for any reason the thread 9 becomes too tight the leaf spring 21 is bent downwardly, as indicated by dob ted lines in Fig. 2, so as to be brought into contact with the screw 25; a circuit thereby being completed as follows: battery 35,

wire 34, binding post 33,. wire 37, binding post 38, wire 40, metallic post 22, contact spring 21, contact screw 25, metallic tongue 23, binding post' 26, wire 27, binding post "28, wire 29, wire 36, to electrically operated mechanism (not shown) used for stopping the machine, thus back to battery 35.

Suppose next that the thread breaks or that the supply of thread becomes exhausted; such bemg the case the swinging arm 16 drops down by its own weightfrom its position indicatedm by full lines in Fig. 2 to its position indicated by dotted lines in said figure, and-by so doing comes into contact with the'contact arm 14. Another circuit is 0 thus completed as'follows: battery 35, wire 34, binding post 33, wire 37, bolt 39, contact arm 14, swinging arm 16, binding post 28, wire 29, binding post 30, wire 36, to electrically operated mechanism for stopping the machine, thence back to battery 35,

arranged so Suppose next that the thread 9 carries a knot or tangled portion of thread; as the thread travels this knot is drawn in between the contact spring 3 and the friction guide 11. Owing to the size of'the knot or tangle the contact spring 3 is forced to the right according to Fig. 2, and thusinto engage- 'ment with the contact screw 6. An electrical circuit is thus closed as follows: battery 35, wire 34, binding post 33, wire 32, contact spring 3, contact 5, contact screw 6, spring 4, wire 31, binding post 30, wire 36, to electrically operated mechanism for stopping the machine, thence back to battery 35.

Thus it will be seen that the sto motion mechanism is operated automatical y in the event that either the thread becomes too tight, or is broken or exhausted, or contains a knot or tangle.

We do not limit ourselves to the precise mechanism shown as variations-therein may be made without departing from our invention, the scope of which is'commensurate with our claims.

We claim:

1. In an electrically operated stop motion, the combination of a standard, a contact leaf spring carried by the standard, said spring being secured at one end andadapted to be flexed by the pressure of a thread exerted on the free end thereof, a member also carried by the standard and arranged adjacent the spring, the spring and member extending in the same direction approximately parallel with each other, a contact screw carried by the member and adapted to engage the spring at a point intermediate of its ends when said spring is flexed,

and an electric circuit connected with the spring and member.

2. Ina stop motion, thread guides, a friction member between theguides, a leaf spring secured at one end and having its free end opposite. the friction member and between which member and spring the thread passes, and a member adjacent the spring and having a contact screw adapted to engage the spring at a point intermediate of its fixedend and the friction member when forced away from the friction member by the thread.

'3. A device of the character described comrising a board, an L-shaped arm mounted t ereupon and extending laterally therefrom, a pair of leaf springs mounted upon said arm, a contact screw extending through one ofjsaid leaf springs and into proximity to the-:other, so that when said last mentioned leaf spring is moved in a particular direction a contact is closed between said leaf springs, and means for conducting a thread against one of said leaf springs.

4. In a device of the character described, a standard provided with spaced thread guides and with a friction member between at a point intermediate of the ends of the v the uides, a leaf spring secured to the spring when said spring is moved by a stan aid and having its free endopposite, thread, and a circult connected with the 10 the friction member of the standard, a memspring and member. 5 her secured to the standard adjacent the spring, aiscrew mounted in the said mem- EDWARD FRANCIS CONNELL,

her and adapted to be engaged by the spring JOHN FRANCIS CONNELL. 

